Cold hardiness & minimum temperature

Is Cardamom (Elettaria cardamomum)cold hardy? Hardiness zone & min temp

Also called Cardamom, Green Cardamom, True Cardamom.

More about cardamom

About Cardamom

Elettaria cardamomum · also called Cardamom, Green Cardamom · herb

Cardamom is a tropical rhizomatous perennial grown for its aromatic seed pods, the world's third most expensive spice. Indoors it makes an elegant foliage plant with strap-like leaves and occasional white-and-purple flowers. It requires warmth, high humidity, and filtered light to thrive.

Cold limit: USDA 10–12 · RHS H1b (18–35°C)

Watch for — Brown leaf tips: The most common symptom of low humidity or fluoride sensitivity. Increase humidity, switch to rainwater or filtered water, and ensure good air circulation without cold draughts.

What cardamom's hardiness rating actually means

Cardamom is not cold hardy. It is a tropical houseplant that dies if it is left out through frost — there is no zone where it overwinters outdoors in a UK or cold-US climate. Its RHS rating of H1b means: Sub-tropical — a normal warm home is fine, but it cannot go outside in a cool season. On the US scale that maps to USDA 10–12 — the zones where it can be left outdoors year-round.

New to these scales? The USDA hardiness zone map explained covers how the zone numbers work, and you can find your own zone with the zone finder.

Minimum temperature — and what happens below it

Minimum survivable temperature is roughly about 10 °C (sustained cold below this is damaging). Cardamom has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

Concretely, for cardamom as it gets too cold:

Below about about 10 °C, growth stalls and the leaves start to show cold stress — dark, water-soaked, or yellowing patches.
A single light frost blackens the foliage; a hard freeze kills the whole plant, roots included, and it does not recover.
Even a cold, draughty windowsill or an unheated porch in winter can be enough to damage it permanently.

Can cardamom go outside or overwinter — and where?

It can holiday outdoors in summer once nights are reliably above 10 °C, in shade or dappled light, hardened off gradually.
Bring it back indoors well before the first autumn frost — do not wait for a frost warning, move it when nights drop toward 10-12 °C.
It will never overwinter outside in a temperate climate; the indoors is its winter home, full stop.

Work back from your local frost dates with the frost-date calculator: the last spring frost and first autumn frost are what really decide when cardamom can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H1b figure above.

Cardamom hardiness — frequently asked questions

Is cardamom cold hardy?

Cardamom is not cold hardy. It is a tropical houseplant that dies if it is left out through frost — there is no zone where it overwinters outdoors in a UK or cold-US climate. Indoor-only in almost every home. Cardamom can only live outside year-round in genuinely frost-free climates (roughly USDA 10–12); everywhere else it is a houseplant that summers out at most.

What is the minimum temperature cardamom can survive?

Minimum survivable temperature is roughly about 10 °C (sustained cold below this is damaging). Cardamom has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

What hardiness zone is cardamom?

Cardamom is rated USDA 10–12 and RHS H1b — Sub-tropical — a normal warm home is fine, but it cannot go outside in a cool season.

Can cardamom survive winter outside?

It can holiday outdoors in summer once nights are reliably above 10 °C, in shade or dappled light, hardened off gradually. Bring it back indoors well before the first autumn frost — do not wait for a frost warning, move it when nights drop toward 10-12 °C. It will never overwinter outside in a temperate climate; the indoors is its winter home, full stop.

What happens to cardamom below its minimum temperature?

Below about about 10 °C, growth stalls and the leaves start to show cold stress — dark, water-soaked, or yellowing patches. A single light frost blackens the foliage; a hard freeze kills the whole plant, roots included, and it does not recover. Even a cold, draughty windowsill or an unheated porch in winter can be enough to damage it permanently.